# Thread: Cool Drink

1. ## Cool Drink

A bartender gets an ice cube weighing 20 grams from an ice bucket and puts it into an insulated cup containing 100 grams of water at 20 degrees Celsius. Will all the ice melt? What will be the final temperature of the water?

2. ## Re: Cool Drink

Not really sure how to do this one, but I think that <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">it will melt and the final temperature will be about 16.6 degrees Celcius</span hide>

StuartR

3. ## Re: Cool Drink

You've got the first part right. The correct solution requires <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold"> Heat of Fusion and Specific Heat Capacity et al</span hide>

4. ## Re: Cool Drink

Yes, of course it does, I was being silly.

StuartR

5. ## Re: Cool Drink

Silly of me not realising you were being silly. Please carry on.

6. ## Re: Cool Drink

<P ID="edit" class=small>(Edited by sdckapr on 30-Nov-06 15:20. Added Work)</P>I get <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">3.3

7. ## Re: Cool Drink

That's what I get. Have a cool drink on me, Steve.

8. ## Re: Cool Drink

One must presume that the ice is <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">at 0

9. ## Re: Cool Drink

Absolutely, Alan. Thanks for pointing that out.

10. ## Re: Cool Drink

An excellent point. I think that since the ice was from an ice bucket and not from a freezer that this seems a reasonable presumption.

<span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">If the ice had come from a freezer we would first have to warm it 0

11. ## Re: Cool Drink

This begs another puzzle. How cold would the ice have to be to freeze the contents of the glass?

Alan

12. ## Re: Cool Drink

As far as I calculate: <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">It is impossible, the ice would have to be < "absolute zero" (I calc about -500

13. ## Re: Cool Drink

I concur Steve. <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">It was, in fact, a trick question (

14. ## Re: Cool Drink

Just to be pedantic (and because I'm not clever/motivated enough to actually do the working out) - since no cup is 100 per cent insulated, the final temperature will (eventually) match the room temperature.

Or, presuming that someone drinks the water, perhaps it will be nearer body temperature...

15. ## Re: Cool Drink

Just to be even more pedantic, what if it's done outdoors?

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